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1、J I S B*8bOS BI W 4933b08 0023433 _- 5 - UDC 621 37.047 _ - a JIS 5 I e JAPANESE I NDUSTRIAL STANDARD Performance Tests of Mechanical Draft Cooling Tower JIS B 8609 -1981 Translated and Published by J a pa ne se Standards Association Printed in Japan 15 S Copyright Japanese Standards Association Pro
2、vided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS 8*8bO 1 W 4933608 0023434 7 Translation without guarantee standard in Japanese is to be evidence i
3、 n the event of any doubt arising, the original Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*!b
4、O 81 4933b08 0023435 9 m UDC 621 57.047 JAPANESE INDUSTRIAL STANDARD J I S Performance Tests of Mechanical Draft B 8609-1981 Cooling Tower. 1. Scope This Japanese Industrial Standard the performance tests at the atmospheric pressure for mechanical draft cooling tower of 200000 kcal/h 233 kW or less
5、in design standard cooling capacity which is the equipment for cooling the warmed cooling water by packaged conditioner, refrigerating apparatus or the like by means of direct contacting operation with the atmosphere and for use of the cooling water by circulation. Remark: In this standard, the unit
6、s and numerical values given in in accordance with the International System of Units(S1) and are appended for informative reference. are 2. Definitions For the purpose of this standard the following definitions apply: standard design temperature water temperature, 32 O C and inlet air wet bulb tempe
7、rature, 27 “C. Inlet water temperature, 37 O C ; outlet design standard cooling capacity design temperature and at design water quantity. The cooling capacity at the standard standard cooling capacity 1 or Test Method 2 of the cooling capacity test. The cooling capacity obtained by Test Method perfo
8、rmance curve of the specimen machine or the cooling tower designed same as the specimen machine. The curve expressing the thermal characteristics water temperature range outlet-water temperatures. The difference between the inlet- and the water mass velocity at right angles to the flow of water. The
9、 value of water quantity divided by the front area air mass velocity right angles to the flow of water, The value of air quantity divided by the front area at specimen machine The cooling tower to be used for performance test. counterflow type cooling tower water flows in opposition to air. The cool
10、ing tower of the type in which Applicable Standards : JIS C 1502-Sound Level Meters JIS Z 873 1 -Methods for Measurement of Sound Level Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25
11、:31 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 JIS Bx8b09 B L = 4933608 002343b O B 8609-1981 (10) crossflow type cooling tower The cooling tower of the type in which water flows in cross at right angles to air. (1 1) stationary conditions The conditions when the mea
12、suring values of the specimen machine have reached the equilibrium in time. (1 2) water-drop loss The sum of the quantity of discharged water drops accompanied by discharge air and the quantity of water spattering from louver to outside. 3. Classification of Test Methods The test methods specified i
13、n this standard shall be classified as follows: (i) Cooling capacity test (2) Noise test (3) Water-drop loss test (4) (5) Insulation resistance test (6) Withstand voltage test Consuming power and operating current test (7) Starting current test 4. Tests 4.1 General The tests shall be carried by use
14、of the instrument specified in (1) and under the conditions specified in (2), unless otherwise specified. (I) Types and Accuracy of Instruments The types and accuracy of the instruments to be used for test shall be in accordance with Table 1. Copyright Japanese Standards Association Provided by IHS
15、under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,-,- Anemometer Biram s wind meter - + 10% Indicating type Electrical instrument Integrating type +0.5$ + I % - IO to 3O
16、oC - J I S ?3*8689 A L E 4933608 0023437 2 E 3 B 8609-1981 Table 1 Types and Accuracy of Instruments Division I TY Pe I Accuracy Air dry bulb temperature and + o. oc air wet bulb temperature - +0.1 O C Water temperature - Liquid-in-glass bar thermometer Thermocouple Re sis t ance thermo- meter Therm
17、ometer Recording type Indicating type Integrating type + 2 % Flowmeter (2) Test Conditions The test conditions, other than those specified in 4.2, shall be in accordance with the following: (a) Water quantity and inlet air relative humidity shall be in accordance with the conditions given in Table 2
18、. inlet water temperature, inlet air wet bulb temperature (b) Permissible variations of voltage and frequency shall be - + 2 % of respective rated values. Table 2. Water Quantity, Temperature and Relative Humidity Conditions Water quantity Inlet water temperature Kind of test method wet bulb . relat
19、ive Cooling t Y Standard design temperature + 2OC (37 E 20c) Test method 1 Design water quantity capac test Standard design temperature Test method 2 +10 % -20 % Design water quant i ty I- 10 to 3OoC + 2OC (37 i 2 OC) +10 % 0 % Design water quantity Noise test +lo$ 0 % Design water quantity Water-dr
20、op loss test 70 % min. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,-,- s 4 J I S B*8bO9 8% H 4933608 00234
21、38 Y H B 8609-1981 4.2 Test Methods 4.2.1 Cooling Capacity Test For the cooling capacity test, place the specimen machine on the testing place shown in 3. of Appendix 1, operate the machine at the rated voltage and rated frequency, and under the conditions for cooling capacity test in Table 2, witho
22、ut make up water and drainage, and after reaching the stationary conditions, carry out the test based on Appendix 1. Further, the water shall be clean water containing no impurities which may affect the cooling capacity. 4.2.2 Noise Test For the noise test, place the specimen machine on the testing
23、place shown in 2. of Appendix 2, operate the machine at the rated voltage and rated frequency, and under the conditions for noise test in Table 2, and carry out the test based on Appendix 2. 4.2.3 Water-Drop Loss Test For the water-drop loss test, place the specimen machine on the testing place show
24、n in 2. of Appendix 3, operate the machine at the rated voltage and rated frequency, and under the conditions for water-drop loss test in Table 2 without make up water and drainage, and after reaching the stationary conditions, carry out the test based on Appendix 3. 4.2.4 Consuming Power and Operat
25、ing Current Test For consuming power and operating current test, measure the consuming power and operating current of the specimen machine when the cooling capacity test specified in 4.2.1 is carried out. Further, calculate the operating power factor from those measured values. 4.2.5 Insulation Resi
26、stance Test For the insulation resistance test, measure the insulation resistance between the live part and the non-live metallic part which might earth by use of 500 V insulation resistance tester, immediately before and after the cooling capacity test in 4.2.1 . 4.2.6 Withstand Voltage Test Carry
27、out the withstand voltage test, following the insulation resistance test of 4.2.5. the live part and the non-live metallic part for 1 min continuously the nearly sinusoidal voltage of 50 Hz or 60 Hz in frequency and at 1000 V for the specimen machine with the rated voltage of 100 V, and at 1500 V fo
28、r rated voltage of 200 V. For the test, apply between In the case where many products of the same design are to be tested and there are caused no doubt, instead of the above-mentioned, the voltage of the 120 % test voltage may be applied for 1 sec. 4.2.7 Starting Current Test For starting current te
29、st, measure the current when the rated voltage at the rated frequency is applied under the con- ditions where the rotor of motor is constrained. th6 rotor of motor is not able to be constrained, apply the voltage at rated frequency under the conditions where the rotor of motor is stopped, pass the c
30、urrent near the operating current measured by the consuming power and operating current test of 4.2.4, then measure the voltage, and calculate the starting current from the following formula: However, in the case where Copyright Japanese Standards Association Provided by IHS under license with JSALi
31、censee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*bO9 81 4933608 0023439 b 5 B 8609-1981 where I,: starting current (A) is : current near the operating current measured by the f ! :
32、 : rated voltage (V) consuming power and operating current test of 4.2.4 (A) : voltage when current I, is passed (V) Remark: In the case where two or more motors start at the same time by the ordinary operation, the starting current shall be the starting current when the currents are passed simultan
33、eously, or the sum of starting currents of respective motors. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,
34、-,- 6 J I S B*8609 81 4933608 0023440 2 B 8609-1981 Appendix 1. Test Methods for Coo1in.g Capacity 1. Scope This Appendix specifies the test method for cooling capacity of counterflow type and crossflow type mechanical draft cooling towers 2. Classification of Test Methods . The test method shall be
35、 either of the following methods: Test Method I standard cooling capacity when the inlet water temperature and the inlet air wet bulb temperature is at the standard design temperature by use of the test results when the test is carried out under the conditions of Test Method 1 of Table 2 in the text
36、. The method to obtain the water temperature range and Test Method 2 cooling capacity at the time of standard design temperature by use of the results of the test carried out under the conditions of Test Method 2 of Table 2 in the text. The method to obtain the water quantity and the standard 3 Test
37、ing Place The testing place shall be as flat as possible and have little affect of wind(l), and the place where the discharged air from the specimen machine does not recirculate. Note (1) The wind velocity shall be not more than 5 m/s. 4. Testing Apparatus An example of testing apparatus is shown in
38、 Fig. 1 (A) and (B) in Appendix 1. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,-,- O a 0 a Appendix 1 . Fi
39、g. I . Cooling Capacity Testing Apparatus (A) Counterflow type cooling tower Specimen machine I _ Flow-rate regulating valve Flowmeter Thermometer)- Cl : specific heat of water ( 1 kcal/kgoC4.l9 kJ/kgK) (kcal/kg“C) kJ/kgK Copyright Japanese Standards Association Provided by IHS under license with JS
40、ALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,-,- 12 B 8609-1981 J I S 8*8609 8L 4933608 0023446 3 M La : measured water quantity (kg/h) Atra : measured water temperature range (OC) Note
41、s (2) The symbol of kg (DA) indicates the unit of mass of dry air in the wet air. (3) (3) The value of inlet air enthalpy h b obtained by using the value of measured inlet air wet bulb temperature t d instead of ti in Appendix 1 , Fig. 5. U N Calculating Method - (a) In the case of counterflow type
42、cooling tower, the state line I, II on the t-h diagram which indicates the change of state of water and air in the counterflow type cooling tower shall be obtained by connecting the intersecting point I of .tcz and hi with intersecting point II of tti and 11, by using Appendix 1, Fig. 6, as shown in
43、 Appendix 1, Fig. 5. Appendix 1. Fig. 5. Change on t-h Diagram Temperature t ( O c ) 4 / II PROBLEM HARO C-OFY Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or
44、 networking permitted without license from IHS -,-,- 13 B 8609-1981 where ti : inlet air wet bulb temperature (OC) t, : water temperature (OC) tli : inlet water temperature (OC) tt2 : outlet water temperature (OC) h : air enthalpy kcal/kg (DA) kJ/kg (DA) It, : inlet air enthalpy kcal/kg (DA) kJ/kg (
45、DA) h, : outlet air enthalpy( 4 , Ckcal/kg (DA) kJ/kg(DA)l It, : enthalpy of saturated air at the same temperature as the water temper ature C kcal/kg (DAI1 k J/kg (DA) h : enthalpy of saturated air at the same temperature as the inlet water temperature kcal/kg (DA) kJ/kg (DA) Alz : enthalpy of satu
46、rated air at the same temperature as the outlet water temperature kcal/kg (DA) kJ/kg (DA) Note (4) !i2 shall be obtained from the following formula: L h2=?r1 4- clG(tlL-t,z) Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, B
47、ernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*8b09 A L m 4933b08 0023448 7 m 14 B 8609-1981 t k JlkgiDE 188.1 167. 146.! 125.C 104.7 s : 5 4 83.72 w 62.75 41.86 20.43 c Appendix 1 . Fig. 6. t-h Diagram of Wet Air 20 Temperature t ( O c ) - 30 35 40 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 02:25:31 MDTNo reproduction or networking permitted without license from IHS -,-,- 15 B 8609-1981 U